Correct Answer: Option D
Explanation:
Phytoplankton, including cyanobacteria, diatoms, and dinoflagellates, are microscopic photosynthetic organisms that drift in oceans and freshwaters. They are primary producers responsible for about half of global oxygen production. Brown, red, and green macroalgae also contribute but phytoplankton are the primary oxygen producers.
This question belongs to:
Science
Biology
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